[PR] typo fix
[PR] typo fix

Summary:
'udpate' to 'update'
Closes https://github.com/facebook/flow/pull/5197

Reviewed By: mroch

Differential Revision: D6197841

Pulled By: calebmer

fbshipit-source-id: 5e4d393ff55d013604195fb43be807db6dec712e

popham/flow,gabelevi/flow,JonathanUsername/flow,facebook/flow,nmote/flow,nmote/flow,facebook/flow,ylu1317/flow,TiddoLangerak/flow,AgentME/flow,mroch/flow,jamesgpearce/flow,mroch/flow,jamesgpearce/flow,gabelevi/flow,facebook/flow,ylu1317/flow,facebook/flow,facebook/flow,claudiopro/flow,AgentME/flow,jamesgpearce/flow,ylu1317/flow,samwgoldman/flow,mroch/flow,AgentME/flow,gabelevi/flow,samwgoldman/flow,jamesgpearce/flow,TiddoLangerak/flow,samwgoldman/flow,gabelevi/flow,mroch/flow,nmote/flow,facebook/flow,gabelevi/flow,popham/flow,AgentME/flow,AgentME/flow,nmote/flow,jamesgpearce/flow,popham/flow,JonathanUsername/flow,facebook/flow,gabelevi/flow,jamesgpearce/flow,nmote/flow,claudiopro/flow,jamesgpearce/flow,gabelevi/flow,JonathanUsername/flow,claudiopro/flow,mroch/flow,popham/flow,ylu1317/flow,TiddoLangerak/flow,popham/flow,claudiopro/flow,JonathanUsername/flow,mroch/flow,JonathanUsername/flow,JonathanUsername/flow,nmote/flow,popham/flow,popham/flow,mroch/flow,JonathanUsername/flow,samwgoldman/flow,samwgoldman/flow,TiddoLangerak/flow,TiddoLangerak/flow,samwgoldman/flow,samwgoldman/flow,claudiopro/flow,ylu1317/flow,nmote/flow